• 使用window.name 进行数据跨域传递


    其中要点,

    Stpe1,浏览器在Iframe中加载一个异域的页面,这个页面返回 <script>window.name=”任何数据”</script>,这时候,取 iframe.contentwindow.name是拒绝访问的。

    Step2,在Iframe中加载一个本域中的任意页面,此时,iframe.contentwindow.name 就可以访问了,

     

    DEMO: 下面是不修饰的代码,

       1:  <script type="text/javascript">
       2:   
       3:          function getContents(iframe) {
       4:              try {
       5:                  // Make sure the iframe's window & document are loaded.
       6:                  if (!iframe.contentWindow || !iframe.contentWindow.document) {
       7:                      console.log("no contentwindow");
       8:                      return null;
       9:                  }
      10:   
      11:                  console.info("window.name=" + iframe.contentWindow.name);
      12:                  // Get the response from window.name
      13:                  return iframe.contentWindow.name;
      14:              } catch (e) {
      15:                  console.error(e);
      16:                  return null;
      17:              }
      18:          }
      19:   
      20:   
      21:          //getContents(this);
      22:   
      23:   
      24:          function test() {
      25:              var doc = document;
      26:              var iframe = doc.createElement('iframe');
      27:              doc.body.appendChild(iframe);
      28:   
      29:              var form = doc.createElement('form');
      30:              doc.body.appendChild(form);
      31:   
      32:              var requestId = "__Go";
      33:              iframe.contentWindow.name = requestId;
      34:              form.target = requestId;
      35:              form.action = "http://castest.youxituan.com/cas/JsLogin";
      36:              form.method = "post";
      37:              var isFirst;
      38:              var time = 0;
      39:              iframe.onload = function () {
      40:                  time++;
      41:                  console.info("time=" + time);
      42:                  if (time == 1) {
      43:                      console.info("first" + iframe.src);
      44:                      iframe.contentWindow.location = 'about:blank';
      45:   
      46:                      //iframe.contentWindow.document.write(".....");
      47:                      isFirst = false;
      48:                  } if (time == 2) {
      49:                      console.info("not first");
      50:                      window.alert(iframe.contentWindow.name);
      51:   
      52:                      //iframe.contentWindow.document.write('');
      53:                      //iframe.contentWindow.close();
      54:                      //document.body.removeChild(iframe);
      55:   
      56:                      //iframe.src = '';
      57:                      iframe = null;
      58:                  }
      59:                  console.log("onload");
      60:                  getContents(iframe);
      61:   
      62:              };
      63:              iframe.onreadystatechange = function () {
      64:                  console.log("onreadystatechange");
      65:                  getContents(iframe);
      66:              };
      67:   
      68:              form.submit();
      69:          }
      70:   
      71:   
      72:          $(function () {
      73:              test();
      74:          });
      75:   
      76:   
      77:      </script>

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  • 原文地址:https://www.cnblogs.com/zbw911/p/3193254.html
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